Quarter Sterling (millions) 2011-03-31 10 2011-06-30 9 2011-09-30 10 2011-12-31 9 2012-03-31 9 2012-06-30 10 2012-09-30 9 2012-12-31 17 2013-03-31 8 2013-06-30 7 2013-09-30 8 2013-12-31 8 2014-03-31 8 2014-06-30 9 2014-09-30 11 2014-12-31 11 2015-03-31 11 2015-06-30 11 2015-09-30 12 2015-12-31 14 2016-03-31 13 2016-06-30 20 2016-09-30 8 2016-12-31 16 2017-03-31 7 2017-06-30 13 2017-09-30 8 2017-12-31 7 2018-03-31 15 2018-06-30 32 2018-09-30 28 2018-12-31 28 2019-03-31 31 2019-06-30 31 2019-09-30 25 2019-12-31 24 2020-03-31 26 2020-06-30 27 2020-09-30 36 2020-12-31 30 2021-03-31 75 2021-06-30 27 2021-09-30 17 2021-12-31 16 2022-03-31 18 2022-06-30 23 2022-09-30 56 2022-12-31 53 2023-03-31 44 2023-06-30 37 2023-09-30 40 2023-12-31 39